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Getting the latest healthcare news for you
Getting the latest healthcare news for you
Researchers have mapped breast tumors at the cellular level and discovered that dormant cancer cells — ones that can "hibernate" through chemotherapy — are surrounded by immune and connective tissue cells that act as protective shields. Published in Genome Medicine, the findings suggest that beating cancer long-term may require targeting not just fast-growing tumor cells, but also these quiet, treatment-evading ones and the cellular neighborhoods that protect them.
Scientists from Imperial College London, UCL, and the MRC Laboratory of Medical Sciences have created detailed cellular maps of breast tumors, revealing a troubling discovery: dormant cancer cells are hiding in plain sight, shielded by surrounding immune and connective tissue cells. Using single-cell RNA sequencing and spatial transcriptomics, the team identified distinct tumor regions — some packed with rapidly dividing cells, others harboring quiet, treatment-resistant ones.
These "quiescent" cancer cells are particularly dangerous because standard chemotherapy drugs work by targeting actively dividing cells, leaving dormant ones largely untouched. After treatment ends, these sleeper cells can reactivate and drive cancer recurrence. Researchers found this pattern across both aggressive and slower-growing breast cancer subtypes — a surprise, since dormancy had previously been associated mainly with slower disease.
Key Takeaways:
Why it matters: Understanding the cellular "shields" around dormant tumor cells could open the door to combination therapies that attack both fast-growing and hibernating cancer cells — potentially reducing the risk of relapse and improving long-term outcomes for breast cancer patients.
